Meiosis

Write a short note on the bivalent chromosome.

In which phase of the meiosis (prophase I)  'recombination nodules' are formed?

During which phase of meiosis does crossing over takes place?

Crossing over is a phenomenon in which genes are exchanged between heterologous chromatid of _____ chromosomes.

Fill up the blanks with suitable words

In Meiosis, chromosomes start _______ which is called __________ thus a ______ of chromatids. Later the non-sister chromatids will undergo ________ leading to genetic material __________.

$\mathrm{A}$
Paring

$B$
Synapsis

$\mathrm{C}$
Exchange

$\mathrm{D}$
Tetrad

$\mathrm{E}$
Crossing over

Correct sequence is

The chromosomes align at the equator and the microtubules from opposite poles of the spindle get attached to the kinetochores of sister chromatids are in

Identify the correct combination of statements.

I. During leptotene, chromosomes become gradually visible.

II. Nuclear membrane and nucleolus do not reappear in Telophase $\mathrm{I}$ of Meiosis $\mathrm{I}.$

III. Anaphase $\mathrm{II}$ does not begin with simultaneous splitting of the centromere of each chromosome in Meiosis $\mathrm{II}.$

IV. Prophase $\mathrm{I}$ is characterised by appearance of bivalent chromosomes as tetrads in Meiosis $\mathrm{I}.$

The correct combination is:

Identify the correct sequence of the following sub-phases of prophase I.
I.  Zygotene
II.  Diplotene
III.  Leptotene
IV. Pachytene
V. Diakinesis

Fill in the blanks with suitable words In Meiosis, chromosomes start -------which is called------ thus form the ---------- of chromatids. Later the nonsister chromatids will undergo------- to -------genetic material

Correct sequence is

Recombinases are _____ recombination enzymes. 

During meiosis, what is the function of the enzyme' recombinase '?

Recombinases are enzymes that catalyze site-specific recombination events within DNA.

What are the functions of recombinases?

Match the given columns and choose the correct option:

Receptor sites for neurotransmitters are present on
 

What is synapsis?

What do you mean by homologous chromosomes?

Write a note on crossing over.

Each gamete contains only one chromosome of a pair because

During anaphase I of meiosis